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vaieri [72.5K]
3 years ago
15

If the life span of a light bulb is 2500 hours, approximately how many weeks can you

Mathematics
1 answer:
Tomtit [17]3 years ago
5 0

● Answer:

~~ 15 weeks

● Step-by-step explanation:

1 week = 7 days = 7×24hours = 168 hours

2500 hours ÷ 168 hours = 14.88 hours

~~ 15 weeks

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A sofa regularly sells for 860. The sale price is 670.80. Find the percent decrease of the sale price from the regular price
andre [41]

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3 years ago
Solve the simultaneous equations:<br><br> 3a-2b=14 <br> 12a+9b=39
kirill [66]
Use elimination
Multiply first equation by 4
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12a + 9b = 39
Subtract both
-17b = 17
b = -1
Plug in -1 for b
3a - 2(-1) = 14
3a = 12, a = 4
Final answer: a = 4, b = -1
5 0
2 years ago
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